make watchlist for core/timing and add myself

WATCHLISTS

 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # Watchlist Rules
 # Refer: http://dev.chromium.org/developers/contributing-code/watchlists
 
 # IMPORTANT: The regular expression filepath is tested against each path using
 # re.search, so it is not usually necessary to add .*.
 
@@ skipping 1322 matching lines @@
       'filepath': 'third_party/WebKit/LayoutTests/http/tests/notifications' \
                   '|third_party/WebKit/Source/modules/notifications' \
                   '|third_party/WebKit/public/platform/modules/notifications'
     },
     'blink_owners': {
       'filepath': 'third_party/WebKit/.*OWNERS',
     },
     'blink_paint': {
       'filepath': 'third_party/WebKit/Source/core/paint/'
     },
+    'blink_performance_timing': {
+      'filepath': 'third_party/WebKit/Source/core/timing/'
+    },
     'blink_permissions': {
       'filepath': 'third_party/WebKit/Source/modules/permissions/' \
                   '|third_party/WebKit/public/platform/modules/permissions/',
     },
     'blink_preloadScanner': {
       'filepath': 'third_party/WebKit/Source/core/html/parser/HTMLPreloadScanner',
     },
     'blink_public_api': {
       'filepath': 'third_party/WebKit/public'
     },
@@ skipping 400 matching lines @@
     'blink_mediastream': ['tommyw+watchlist@chromium.org'],
     'blink_modules': ['haraken@chromium.org'],
     'blink_navigator_content_utils': ['gyuyoung.kim@chromium.org'],
     'blink_notifications': ['awdf+watch@chromium.org',
                             'peter@chromium.org'],
     'blink_out_of_process_frames': ['dcheng@chromium.org',
                                     'mlamouri+watch-blink@chromium.org'],
     'blink_owners': ['abarth@chromium.org'],
     'blink_paint' : ['blink-reviews-paint@chromium.org',
                      'dongseong.hwang@intel.com'],
+    'blink_performance_timing': ['panicker+watch@chromium.org'],
     'blink_permissions': ['mlamouri+watch-blink@chromium.org'],
     'blink_platform': ['kinuko+watch@chromium.org'],
     'blink_platform_graphics': ['ajuma+watch@chromium.org',
                                 'blink-reviews-platform-graphics@chromium.org',
                                 'cabanier@adobe.com',
                                 'dongseong.hwang@intel.com',
                                 'drott+blinkwatch@chromium.org',
                                 'dschulze@chromium.org',
                                 'fmalita+watch@chromium.org',
                                 'junov@chromium.org',
@@ skipping 455 matching lines @@
                          'msramek+watch@chromium.org',
                          'raymes+watch@chromium.org'],
     'windows_sandboxing': ['pennymac+watch@chromium.org',
                            'wfh+watch@chromium.org'],
     'x11': ['derat+watch@chromium.org',
             'sadrul@chromium.org',
             'yusukes+watch@chromium.org'],
     'zoom': ['wjmaclean@chromium.org'],
   },
 }